We present an analysis workflow tailored to quantifying microplastic contamination.
It outlines a consistent and sequential process for analysis and decision making.
We apply the workflow to marine tow samples from remote North-Western Australia.
Spectroscopy refutes plastic origin of >60% of particles first identified visually.
The workflow will provide more realistic and comparable contamination estimates.
Frederieke Kroon, Cherie Motti, Sam Talbot, Paula Sobral, Marji Puotinen, Environmental Pollution, Volume 238, July 2018, Pages 26–38